Hello
I sent originally this report to the gphoto2 list, but the problem might
as well be on the kernel-level, since I am also getting some kernel
error-messages. So, first access with gphoto2 -L (get list of files from
the camera) succeeds, second one fails. From the kernel I get:
usb-uhci.c: interrupt, status 3, frame# 1745
usbdevfs: USBDEVFS_BULK failed dev 2 ep 0x82 len 16 ret -75
Debugging output from gphoto2 shows some extra data on the second access:
(first run)
...
0.062832 gphoto2-port(2): Reading 512=0x200 bytes from port...
0.249858 gphoto2-port(3): Hexdump of 512 = 0x200 bytes follows:
0000 00 00 00 00 00 00 00 00-01 00 14 00 53 49 4d 47 ............SIMG
0010 30 30 30 39 2e 6a 70 67-eb 78 e4 2a 00 a0 0b 00 0009.jpg.x.*....
0020 53 49 4d 47 30 30 31 30-2e 6a 70 67 28 7c e9 2a SIMG0010.jpg(|.*
...
(second run)
...
0.063917 gphoto2-port(2): Reading 512=0x200 bytes from port...
0.359949 gphoto2-port(3): Hexdump of 512 = 0x200 bytes follows:
0000 68 10 b4 2b 70 ac cc cf-b8 20 fe f0 c7 fa b0 6a h..+p.........j
0010 ef 85 fc 1e 74 eb 1d 46-c7 c4 5e 31 d3 75 c1 7f ....t..F..^1.u..
0020 e5 ed 9a 5b d9 a1 92 df-6e e3 98 d9 64 ca 92 4a ...[....n...d..J
0030 e7 b1 c6 08 20 d7 a1 87-c7 7b 08 d9 c1 bd fa ff ........{......
0040 00 00 00 00 00 00 00 00-01 00 14 00 53 49 4d 47 ............SIMG
0050 30 30 30 39 2e 6a 70 67-eb 78 e4 2a 00 a0 0b 00 0009.jpg.x.*....
0060 53 49 4d 47 30 30 31 30-2e 6a 70 67 28 7c e9 2a SIMG0010.jpg(|.*
...
So, you see, before the actual list of files 0x40 bytes of data are read
from the port. The error I get from gphoto2 is not very informative:
context(0): An error occurred in the io-library ('Unspecified error'): No
error description available
*** Error (-1: 'Unspecified error') ***
So, maybe those 64 bytes is what actually belongs to that interrupt
(frame# 1745)?
The system: ASUS A7VI-VM motherboard with VIA ProSavage KM133 chipset. I
tried both uhci and usb-uhci modules - same. Kernel 2.4.20, SuSE-8.0,
libusb-0.1.5, libgphoto2-2.1.1, gphoto2-2.1.1. The camera is Concord eye-Q
4330z.
Thanks in advance
Guennadi
---
Guennadi Liakhovetski
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